Methods and apparatus for recording electric signals

Claim 2

In a method of recording electric signals on a recording medium having a light sensitivity extending from wavelengths longer than 475 nm to wavelengths shorter than 475 nm, the improvement comprising in combination the steps of: providing an array of electrically switchable, lanthanum modified lead zirconate titanate (PLZT) light gates between a light polarizer and a complementary light analyzer; illuminating said light gates through said polarizer with light whose wavelengths essentially is longer than 475 nm within the light sensitivity of said recording medium; electrically switching light gates among said illuminated light gates with said electric signals to gate light whose wavelength essentially is longer than 475 nm selectively through switched illuminated light gates and said analyzer; and exposing said recording medium, having a light sensitivity extending to wavelengths shorter than 475 nm, to said selectively gated light whose wavelength essentially is longer than 475 nm.

Claim 3

In a method of recording electric signals on a recording medium having a light sensitivity extending from wavelengths longer than 475 nm to wavelengths shorter than 475 nm, the improvement comprising in combination the steps of: providing an array of electrically switchable, lanthanum modified lead zirconate titanate (PLZT) light gates between a light polarizer and a complementary light analyzer; providing light having a wavelength shorter than, and a wavelength longer than, 475 nm within the light sensitivity of said recording medium; providing a filter in addition to said polarizer for blocking portions of said light having wavelengths shorter than 475 nm; illuminating said light gates through said filter and polarizer with said light thereby blocking out portions of said light having wavelengths shorter than 475 nm; electrically switching light gates among said illuminated light gates with said electric signals to gate light, having wavelengths shorter than 475 nm blocked out, selectively through said illuminated light gates and said analyzer; and exposing said recording medium, having a light sensitivity extending to wavelengths shorter than 475 nm, to said selectively gated light having wavelengths shorter than 475 nm blocked out.

Claim 4

In a method of recording electric signals on a recording medium having a light sensitivity extending from wavelengths longer than 475 nm to wavelengths shorter than 475 nm, the improvement comprising in combination the steps of: providing an array of electrically switchable, lanthanum modified lead zirconate titanate (PLZT) light gates between a light polarizer and a complementary light analyzer; providing light having a wavelength shorter than, and a wavelength longer than, 475 nm within the light sensitivity of said recording medium; providing a filter in addition to said polarizer for blocking portions of said light having wavelengths shorter than 475 nm; illuminating said light gates through said filter and polarizer with said light thereby blocking out portions of said light having wavelengths shorter than 475 nm; electrically switching light gates among said illuminated light gates with said electric signals to gate light, having wavelengths shorter than 475 nm blocked out, selectively through said illuminated light gates and said analyzer; and exposing said recording medium, having a light sensitivity extending to wavelengths shorter than 475 nm, to said selectively gated light having wavelengths shorter than 475 nm blocked out.

Claim 5

In apparatus for recording electric signals on a recording medium having a light sensitivity extending from wavelengths longer than 475 nm to wavelengths shorter than 475 nm, the improvement comprising in combination: an array of electrically switchable, lanthanum modified lead zirconate titanate (PLZT) light gates between a light polarizer and a complementary light analyzer; means for illuminating said light gates through said polarizer with light whose wavelength essentially is longer than 475 nm within the light sensitivity of said recording medium; means connected to said array for electrically switching light gates with said electric signals to gate light whose wavelength essentially is longer than 475 nm selectively through switched illuminated light gates and said analyzer; and means coupled to said recording medium for exposing said recording medium, having a light sensitivity extending to wavelengths shorter than 475 nm, to said selectively gated light whose wavelength essentially is longer than 475 nm.

Claim 6

In apparatus for recording electric signals on a recording medium having a light sensitivity extending from wavelengths longer than 475 nm to wavelengths shorter than 475 nm, the improvement comprising in combination: an array of electrically switchable, lanthanum modified lead zirconate titanate (PLZT) light gates between a light polarizer and a complementary light analyzer; means for illuminating said light gates through said polarizer with light whose wavelength essentially is longer than 475 nm within the light sensitivity of said recording medium; means connected to said array for electrically switching light gates with said electric signals to gate light whose wavelength essentially is longer than 475 nm selectively through switched illuminated light gates and said analyzer; and means coupled to said recording medium for exposing said recording medium, having a light sensitivity extending to wavelengths shorter than 475 nm, to said selectively gated light whose wavelength essentially is longer than 475 nm.

Claim 7

In apparatus for recording electric signals on a recording medium having a light sensitivity extending from wavelengths longer than 475 nm to wavelengths shorter than 475 nm, the improvement comprising in combination: an array of electrically switchable, lanthanum modified lead zirconate titanate (PLZT) light gates between a light polarizer and a complementary light analyzer; a source of light having a wavelength shorter than, and a wavelength longer than, 475 nm within the light sensitivity of said recording medium; means including a filter in addition to said polarizer for blocking portions of said light having wavelengths shorter than 475 nm; means for illuminating said light gates through said filter and polarizer with light from said source thereby blocking out portions having wavelengths shorter than 475 nm; means connected to said arrays for electrically switching light gates among said illuminated light gates with said electric signals to gate light, having wavelengths shorter than 475 nm blocked out, selectively through said illuminated light gates and said analyzer; and means coupled to said recording medium for exposing said recording medium, having a light sensitivity extending to wavelengths shorter than 475 nm, to said selectively gated light having wavelengths shorter than 475 nm blocked out.

Claim 8

In apparatus for recording electric signals on a recording medium having a light sensitivity extending from wavelengths longer than 475 nm to wavelengths shorter than 475 nm, the improvement comprising in combination: an array of electrically switchable, lanthanum modified lead zirconate titanate (PLZT) light gates between a light polarizer and a complementary light analyzer; a source of light having a wavelength shorter than, and a wavelength longer than, 475 nm within the light sensitivity of said recording medium; means including a filter in addition to said polarizer for blocking portions of said light having wavelengths shorter than 475 nm; means for illuminating said light gates through said filter and polarizer with light from said source thereby blocking out portions having wavelengths shorter than 475 nm; means connected to said arrays for electrically switching light gates among said illuminated light gates with said electric signals to gate light, having wavelengths shorter than 475 nm blocked out, selectively through said illuminated light gates and said analyzer; and means coupled to said recording medium for exposing said recording medium, having a light sensitivity extending to wavelengths shorter than 475 nm, to said selectively gated light having wavelengths shorter than 475 nm blocked out.

Claim 9

In a method for direct recording electric signals on direct recording paper having a light sensitivity extending from wavelengths longer than 475 nm to wavelengths shorter than 475 nm, the improvement comprising in combination the steps of: providing an array of electrically switchable, lanthanum modified lead zirconate titanate (PLZT) light gates between a light polarizer and a complementary light analyzer; and inhibiting photoinduced birefringence in said PLZT light gates by illuminating said light gates through said polarizer with light whose wavelength essentially is longer than 475 nm within the light sensitivity of said recording paper, electrically switching light gates among said illuminated light gates with said electric signals to gate light whose wavelengths essentially is longer than 475 nm selectively through switched illuminated light gates and said analyzer, and generating directly on said direct recording paper a directly visible record of said electric signals by exposing said recording paper, having a light sensitivity extending to wavelengths shorter than 475 nm, to said selectively gated light whose wavelength essentially is longer than 475 nm.

Claim 10

In a method for direct recording electric signals on direct recording paper having a light sensitivity extending from wavelengths longer than 475 nm to wavelengths shorter than 475 nm, the improvement comprising in combination the steps of: providing an array of electrically switchable, lanthanum modified lead zirconate titanate (PLZT) light gates between a light polarizer and a complementary light analyzer; and inhibiting photoinduced birefringence in said PLZT light gates by illuminating said light gates through said polarizer with light whose wavelength essentially is longer than 475 nm within the light sensitivity of said recording paper, electrically switching light gates among said illuminated light gates with said electric signals to gate light whose wavelengths essentially is longer than 475 nm selectively through switched illuminated light gates and said analyzer, and generating directly on said direct recording paper a directly visible record of said electric signals by exposing said recording paper, having a light sensitivity extending to wavelengths shorter than 475 nm, to said selectively gated light whose wavelength essentially is longer than 475 nm.

Claim 11

In a method of direct recordng electric signals on direct recording paper having a light sensitivity extending from wavelengths longer than 475 nm to wavelengths shorter than 475 nm, the improvement comprising in combination the steps of: providing an array of electrically switchable, lanthanum modified lead zirconate titanate (PLZT) light gates between a light polarizer and a complementary light analyzer; providing light having a wavelength shorter than, and a wavelength longer than, 475 nm within the light sensitivity of said recording paper; and inhibiting photoinduced birefringence in said PLZT light gates by providing a filter in addition to said polarizer for blocking portions of said light having wavelengths shorter than 475 nm, electrically switching light gates among said illuminated light gates with said electric signals to gate light, having wavelengths shorter than 475 nm blocked out, selectively through said illuminated light gates and said analyzer, and generating directly on said direct recording paper a directly visible record of said electric signals by exposing said recording paper, having a light sensitivity extending to wavelengths shorter than 475 nm, to said selectively gated light having wavelengths shorter than 475 nm blocked out.

Claim 12

In a method of direct recordng electric signals on direct recording paper having a light sensitivity extending from wavelengths longer than 475 nm to wavelengths shorter than 475 nm, the improvement comprising in combination the steps of: providing an array of electrically switchable, lanthanum modified lead zirconate titanate (PLZT) light gates between a light polarizer and a complementary light analyzer; providing light having a wavelength shorter than, and a wavelength longer than, 475 nm within the light sensitivity of said recording paper; and inhibiting photoinduced birefringence in said PLZT light gates by providing a filter in addition to said polarizer for blocking portions of said light having wavelengths shorter than 475 nm, electrically switching light gates among said illuminated light gates with said electric signals to gate light, having wavelengths shorter than 475 nm blocked out, selectively through said illuminated light gates and said analyzer, and generating directly on said direct recording paper a directly visible record of said electric signals by exposing said recording paper, having a light sensitivity extending to wavelengths shorter than 475 nm, to said selectively gated light having wavelengths shorter than 475 nm blocked out.

Claim 13

In apparatus for direct recording electric signals on direct recording paper having a light sensitivity extending from wavelengths longer than 475 nm to wavelengths shorter than 475 nm, the improvement comprising in combination: an array of electrically switchable, lanthanum modified lead zirconate titanate (PLZT) light gates between a light polarizer and a complementary light analyzer; means for inhibiting photoinduced birefringence in said PLZT light gates, including means for illuminating said light gates through said polarizer with light whose wavelength essentially is longer than 475 nm within the light sensitivity of said recording paper; means connected to said array for electrically switching light gates with said electric signals to gate light whose wavelength essentially is longer than 475 nm selectively through switched illuminated light gates and said analyzer; and means for generating directly on said direct recording paper a directly visible record of said electric signals by exposing said recording paper, having a light sensitivity extending to wavelengths shorter than 475 nm, to said selectively gated light whose wavelength essentially is longer than 475 nm.

Claim 14

In apparatus for direct recording electric signals on direct recording paper having a light sensitivity extending from wavelengths longer than 475 nm to wavelengths shorter than 475 nm, the improvement comprising in combination: an array of electrically switchable, lanthanum modified lead zirconate titanate (PLZT) light gates between a light polarizer and a complementary light analyzer; means for inhibiting photoinduced birefringence in said PLZT light gates, including means for illuminating said light gates through said polarizer with light whose wavelength essentially is longer than 475 nm within the light sensitivity of said recording paper; means connected to said array for electrically switching light gates with said electric signals to gate light whose wavelength essentially is longer than 475 nm selectively through switched illuminated light gates and said analyzer; and means for generating directly on said direct recording paper a directly visible record of said electric signals by exposing said recording paper, having a light sensitivity extending to wavelengths shorter than 475 nm, to said selectively gated light whose wavelength essentially is longer than 475 nm.

Claim 15

In apparatus for direct recording electric signals on direct recording paper having a light sensitivity extending from wavelengths longer than 475 nm to wavelengths shorter than 475 nm, the improvement comprising in combination: an array of electrically switchable, lanthanum modified lead zirconate titanate (PLZT) light gates between a light polarizer and a complementary light analyzer; a source of light having a wavelength shorter than, and a wavelength longer than, 475 nm within the light sensitivity of said recording paper; means for inhibiting photoinduced birefringence in said PLZT light gates, including a filter in addition to said polarizer for blocking portions of said light having wavelengths shorter than 475 nm and means for illuminating said light gates through said filter and polarizer with light from said source thereby blocking out portions having wavelengths shorter than 475 nm; means connected to said arrays for electrically switching light gates among said illuminated light gates with said electric signals to gate light, having wavelengths shorter than 475 nm blocked out, selectively through said illuminated light gates and said analyzer; and means for generating directly on said direct recording paper a directly visible record of said electric signals by exposing said recording paper, having a light sensitivity extending to wavelengths shorter than 475 nm, to said selectively gated light having wavelengths shorter than 475 nm blocked out.

Claim 16

In apparatus for direct recording electric signals on direct recording paper having a light sensitivity extending from wavelengths longer than 475 nm to wavelengths shorter than 475 nm, the improvement comprising in combination: an array of electrically switchable, lanthanum modified lead zirconate titanate (PLZT) light gates between a light polarizer and a complementary light analyzer; a source of light having a wavelength shorter than, and a wavelength longer than, 475 nm within the light sensitivity of said recording paper; means for inhibiting photoinduced birefringence in said PLZT light gates, including a filter in addition to said polarizer for blocking portions of said light having wavelengths shorter than 475 nm and means for illuminating said light gates through said filter and polarizer with light from said source thereby blocking out portions having wavelengths shorter than 475 nm; means connected to said arrays for electrically switching light gates among said illuminated light gates with said electric signals to gate light, having wavelengths shorter than 475 nm blocked out, selectively through said illuminated light gates and said analyzer; and means for generating directly on said direct recording paper a directly visible record of said electric signals by exposing said recording paper, having a light sensitivity extending to wavelengths shorter than 475 nm, to said selectively gated light having wavelengths shorter than 475 nm blocked out.